Gary Tin

• Designed and developed WhatsApp business workflows, web onboarding and creator-portfolio capabilities using AI-assisted engineering; aligned service contracts and identity integrations.
• Refactored agent context and task handling, managed versioned Langfuse prompts and used traces to investigate conversational behavior.
• Coordinated multi-service production releases and selected live workflow checks; introduced PostHog tracking and masked replay to support product evaluation.
• Proposed and developed Symphony, including ClickUp integration, analytics, notifications, team onboarding and feedback-driven improvements.
• Built worksheet-driven agent testing and requirement-check/update workflows with ticket creation; published six reusable PM Tool skills with installation guidance and validation.
• Built reusable AI-assisted development workflows with independent QA and engineering handoff; prepared business discovery and phased planning for an HR pilot.

Client work in airline mobile applications.

• Co-led a 14-person mobile-booking delivery team, aligning design, payment, web, backend and mobile stakeholders.
• Owned a Node.js/TypeScript/NestJS backend-for-frontend, covering requirements, implementation, unit tests, integration documentation, staging deployment and production support; coordinated QA-led load testing and UAT.
• Provided cross-team technical enablement and supervised technical-enablement and shared-component Team Leads, reviewing plans, technical approaches and significant blockers.

Client work in airline backend systems and mobile technical enablement.

• Primarily owned order and notification services and booking-management/query services using Java, Spring Boot/WebFlux, PostgreSQL/R2DBC and Redis; handled API contracts, integration and tests.
• Designed and implemented order/payment concurrency protection and supported staging readiness and go-live troubleshooting.
• Led three offshore teammates in technical enablement and coordinated requirements across five other teams.
• Independently delivered Azure Pipelines/Python dependency-build automation for two mobile applications across iOS and Android, including build ordering, overrides, onboarding and handover.

• Worked on email-marketing automation and served as primary author of a functional specification for an AI-assisted customer-profile and workflow integration proposal.